Process of producing alumino-silicates.



A UNITED STATES PATENT orricn Bonner sans, or GRU'NE'WALD-BERLIN, GERMANY, ASS-IGNOR "r PERMUTITA AxrmNeEsELLs'cnAr'n-or BERLIN, GERMANY.

OF PRODUCING AIiUMINO SILICATES'.

No Drawing. I v

To all whom it may concern Be it known that 1-, Professor Dr. ROBERT.-

- heat, in order to accelerate the process.

a subjectof the German Emperor,

GANS,

Germany,

residing at GriinewaId Berlin,

5 have-invented'certain new and useful Im-' provements in the Process of Producing v :Alumino-Silicates, of which the following is a specification. T

It is well-known, that alumino-silicates,

perience has shown, that in the treatment of water, which is rich inorganic matter orin.

organic or other acids, or of water, in which dissolved out of the 'alumino-sil'icates and;

that the alumino-silicates themselves become more or less acid. Alumino-silicates modified in this manner may be revivified or resilicates will readily assume a'gelatinous or colloid condition, which impairs their permeability. 1 3G cates changed in such a manner, viz: for restoring. their original physical condition, have led to the result, that it is possible, generally, to convert acid alumino-silicates having a. kaolinslike composition, (which include also the products :ot decomposition v of -zeolites or alumino-silicatescontaining as taining a normal quantity ofsilieie acid, by

treatt'with an excess at concentrated solution of an alkali metal silicate, whereby at: candied,-

a. tablefor- -1 an: with com -may easily cause unexpected precipitations,

or rocks and minerals containing the same, are used for the purification of water. Ex-

stored by treatment with alkali-metal com Experiments which were de primm'ilyv 4 for the purpose of-revivifying alumi'n'o-sili-l' water), into neutral aluminorsi 'cates con;-

Specification of Letters ratent. Patented Dec 15, 1914 Application filed October 16,1913. Serial No. 795,581.

kali-metal silicate may take place either at ordinary temperature, or with the aid of In case alkaline earths are present, they if the material containing the same is treated with alkali-metal silicates." It is desir able, therefore, to subject the alumino silicates first'to a preliminary treatment with a warm 8-10 per cent. solution of common salt (sodium chlorid) in order to exchange the Whole of the alkaline earths, that maybe presentin the zeolite, for alkalis. v The process described above may be used with advantage, for instance, for restoring v the granular structure to alumina-silicates :which have been used for filtration and which have thereby lost their original hard,

granular and, (for liquids), easily permeable condition, and thereby rendering them again suitable for purposes of filtration.

WhatI claim is 1. The process of producing easily permeable granular or scaly alumino-silicates or zeolitic material from acid silicates containing alumina and having a kaolin-like composition, which consists in treating the latter with an alkali-metal silicate, substan-- tially as described.

2aflll16- process; for the i at =1 cates containing alumina and havin :1. kaolin-like composition, which. conslsts in treating the latter first with a solution'of common salt and subsequently with analkali-metal silicate, substantially as and for the purpose described. 7

In testimony whereof I have hereunto set my handin presencezot twosumcribing wit.- I messes. e

nfa ofl lt'e I I easily permeable granular or scaly alumina silicates or zeolitic material from acid s1h-. 

